Instructions:
Copy xf-adesk19 to your Desktop
Open terminal (Command+Space and type Terminal and press enter/return key)
Paste the following code in terminal:
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null
Wait for the command to finish. After completion run the following code:
brew install upx
Now run this command:
sudo upx -d ~/Desktop/xf-adesk19.app/Contents/MacOS/x-force
Close the terminal and open the xf-adesk19 on your Desktop.
Done!